Average GPS coordinates for New Haven Postcode location: 37.9, -88.129. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). New Haven on map:

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Listing cities & postcodes (1):
>> Illinois, 62867 New Haven, Gallatin, GPS coordinates: 37.8999,-88.1285